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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7350) Use ServiceLoader to discover compression codec classes
Date Thu, 02 Jun 2011 01:24:47 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7350?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13042554#comment-13042554
] 

Todd Lipcon commented on HADOOP-7350:
-------------------------------------

- We should probably remove the codecs from core-default.xml now that they're loaded via ServiceLoader
- Is there a way to inject a new codec programatically through the ServiceLoader interface?
If so, we could entirely deprecate io.compression.codecs. If not, maybe we should rename it
to something like io.compression.extra.codecs and specify that it's only necessary if you
have a codec that doesn't expose itself through ServiceLoader?
- hdfs-default.xml has an item dfs.image.compression.codec that needs to be updated

> Use ServiceLoader to discover compression codec classes
> -------------------------------------------------------
>
>                 Key: HADOOP-7350
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7350
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: conf, io
>            Reporter: Tom White
>            Assignee: Tom White
>         Attachments: HADOOP-7350.patch
>
>
> By using a ServiceLoader users wouldn't have to add codec classes to io.compression.codecs
for codecs that aren't shipped with Hadoop (e.g. LZO), since they would be automatically picked
up from the classpath.

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